Broad-band spectral analysis of LMXB 2S 0921-63 with Suzaku
arXiv:2209.00282 · doi:10.1093/mnras/stac2698
Abstract
We present the broad-band spectral analysis of the low-mass X-ray binary 2S 0921-63 by using the Suzaku archival data covering the orbital phase between 0.31 and 1.16 during four close observations. It is the first time that a broad-band spectral analysis of 2S 0921-63 has been done up to 25 keV. The 0.5-10 keV XIS count rate varied between 1 and 5 counts s during the observations. A partial X-ray eclipse and broad post-eclipse intensity dip were observed during the observations. The X-ray emission hardened marginally during the intensity dip. We have modelled the source spectra by simultaneously fitting the XIS and HXD-PIN spectra for each of the four observations. The broad-band spectra of the source can be described by a model comprising a very hot blackbody having temperature, 1.66 - 2.13 keV, a high-energy cutoff power law, and an Fe emission line at 6.7 keV. A second model, accounting for the Comptonization of the thermal emission from accretion disc along with an Fe emission line, describes the broad-band spectra of 2S 0921-63 equally well.
arXiv comment7 pages, 6 figures, 2 Tables, Accepted for publication in MNRAS
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